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Method and system for diagnosis and analysis of products troubles

  • US 5,596,712 A
  • Filed: 07/08/1992
  • Issued: 01/21/1997
  • Est. Priority Date: 07/08/1991
  • Status: Expired due to Term
First Claim
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1. A computer-implemented method of diagnosing and analyzing fault information of a product, said method comprising the steps of:

  • a) creating a hierarchical fault tree structure representing causal relationships of faults based on structure and characteristic data of the product and storing said fault tree in storage means, said fault tree having branches allocated with weighting coefficients predetermined according to previous faults and causes thereof;

    b) inputting new fault information of the product;

    c) in response to the inputting of said new fault information, searching said fault tree in accordance with said weighting coefficients based on said fault information stored in said storage means to thereby determine a cause of the fault of said product;

    d) generating and outputting data concerning an adjustment or repair of said product suffering from the fault based on the determined cause of fault as well as the structure and characteristic data of said product;

    e) supplying specific fault information including information concerning timing of the occurrence of the fault of said product, symptoms of the fault, the determined cause of the fault and the adjustment and repair data to a marketing product quality information collecting/analysis facility through a data collecting station, wherein said marketing product quality information collecting/analysis facility is supplied with the specific fault information regarding a plurality of units of the product, to thereby provide a database for said fault information, wherein the database fault information is continuously updated; and

    f) statistically analyzing, in said marketing product quality information collecting/analysis facility quality of said product based on all or a part of the database fault information.

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